docs: def hit(self, code, line, duration):
          """
          A line has finished executing.
  
          code (code)
            container function's code object
          line (int)
            line number of just executed line
          duration (float)
            duration of the line, in seconds
          """
          entry = self.line_dict[line][code]
          entry[0] += 1
          entry[1] += duration